LIQUEFACTION CYCLE OF NATURAL GAS USING MULTI-COMPONENT REFRIGERANT EXPANDER AND THE WORKING METHOD

摘要

PURPOSE: A liquefaction cycle device for natural gas using a mixed coolant and an operation method thereof are provided to replace an agitating process by a conventional Joule-Thomson expansion valve with a turbine expander. CONSTITUTION: A liquefaction cycle device for natural gas using a mixed coolant with a turbine expander includes the following: a compressor(100) transferring the mixed coolant through a pipe after producing the mixed coolant with high pressure; a fist and a second gas-liquid separators(310) separating the mixed coolant to gas and liquid; the turbine expander(500) changing the coolant on a overheated vapor state to the coolant in low temperature; and a plurality of heat exchangers(200,210,220,230,240) connected to the first, the second gas and liquid separators and the turbine expander.